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bpf: fix bpf_skb_pull_data documentation

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Fix documentation for bpf_skb_pull_data() helper for
when len == 0.

Fixes: fa15601ab3 ("bpf: add documentation for eBPF helpers (33-41)")
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/r/20220715193800.3940070-1-joannelkoong@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Joanne Koong 2022-07-15 12:38:00 -07:00 committed by Alexei Starovoitov
parent a1ac9fd6c6
commit bdb2bc7599
2 changed files with 4 additions and 2 deletions
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3
include/uapi/linux/bpf.h
View File

@ -2361,7 +2361,8 @@ union bpf_attr {
* Pull in non-linear data in case the *skb* is non-linear and not
* all of *len* are part of the linear section. Make *len* bytes
* from *skb* readable and writable. If a zero value is passed for
* *len*, then the whole length of the *skb* is pulled.
* *len*, then all bytes in the linear part of *skb* will be made
* readable and writable.
*
* This helper is only needed for reading and writing with direct
* packet access.

3
tools/include/uapi/linux/bpf.h
View File

@ -2361,7 +2361,8 @@ union bpf_attr {
* Pull in non-linear data in case the *skb* is non-linear and not
* all of *len* are part of the linear section. Make *len* bytes
* from *skb* readable and writable. If a zero value is passed for
* *len*, then the whole length of the *skb* is pulled.
* *len*, then all bytes in the linear part of *skb* will be made
* readable and writable.
*
* This helper is only needed for reading and writing with direct
* packet access.